Detective Club. Oral account treasury quest. Addition and subtraction

The idea of ​​the project, how is this idea embodied? Why should this book be bought? A group of buyers in the city has a crime!
There is no doubt that the famous detective will reveal him! But the intrigue will remain to the end. You can become participants in eight investigations of world -famous detectives and one deduction lesson from Sherlock Holmes himself, and at the same time learn to quickly count in the mind.
The simulator is ideal for collective quests in lessons and classes of mathematical circles. Recommended age: 2-4 grades.
It is recommended for use with the book "Quest Trender Oral Account. Addition and subtraction ", as well as with other notebooks for collective quests